[Gdal-dev] terchnical query

[Frank Warmerdam]

chenxuexia wrote:
>  
>    hello,gdal teams.
>    Now i begin to  use gdal to develop a plugg-in for reading ArcGIS 
> data. There's a field value showing like "2.3565E-06", and the field 
> type  is displayed as float in ArcCatolog£¬also displayed as figure 
> while export to dBase. But when i reading it in gdal, the field type is 
> "OFTIntegerList", i wanna know :
> 1.  how and why do you store this "2.3565E-06" as an IntegerList?

Chenchen,

I cannot think of any reason an attribute on a shapefile
should be treated as an integer list.  Is this a shapefile
dataset?  Or perhaps SDE? E00? Arc/Info Binary Coverage?

> 2.  how can i reading field of this type into a CString object?

GetFieldAsString() should be suitable, though for integer lists
it may be truncated if the list is long.

> 3.  which types can be readed  by GetFieldAsString() function?

GetFieldAsString() should do something reasonable for all field
types, though in some cases the result is truncated.

I think you will need to provide a sample dataset demonstrating
the issue.  It might also be helpful to verify ogrinfo is
getting the same results you are finding.

Best regards,
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